Effect of concentration polarisation in organic solvent nanofiltration-flat sheet and spiral wound systems

摘要

In recent years the possibility of using poly-meric organic solvent nanofiltration (OSN) mem-branes for non-aqueous separations has been explored and published for a wide range of appli-cations at full process and lab scale.Examples include solvent dewaxing,solvent exchange,organometallic catalyst recovery,de-acidification of vegetable oils,etc.While a growing number of publications investigate the fundamental mecha-nisms involved in specie transport through OSN membranes,nearly all of the data published for OSN transport studies has been obtained in the low specie concentration range (<1 wt% solute in solvent).